react-virtualized/dist/commonjs/Collection/Section.js

React components for efficiently rendering large, scrollable lists and tabular data

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _types = require('./types');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * A section of the Window.
 * Window Sections are used to group nearby cells.
 * This enables us to more quickly determine which cells to display in a given region of the Window.
 * Sections have a fixed size and contain 0 to many cells (tracked by their indices).
 */
var Section = function () {
  function Section(_ref) {
    var height = _ref.height,
        width = _ref.width,
        x = _ref.x,
        y = _ref.y;
    (0, _classCallCheck3.default)(this, Section);

    this.height = height;
    this.width = width;
    this.x = x;
    this.y = y;

    this._indexMap = {};
    this._indices = [];
  }

  /** Add a cell to this section. */


  (0, _createClass3.default)(Section, [{
    key: 'addCellIndex',
    value: function addCellIndex(_ref2) {
      var index = _ref2.index;

      if (!this._indexMap[index]) {
        this._indexMap[index] = true;
        this._indices.push(index);
      }
    }

    /** Get all cell indices that have been added to this section. */

  }, {
    key: 'getCellIndices',
    value: function getCellIndices() {
      return this._indices;
    }

    /** Intended for debugger/test purposes only */

  }, {
    key: 'toString',
    value: function toString() {
      return this.x + ',' + this.y + ' ' + this.width + 'x' + this.height;
    }
  }]);
  return Section;
}();

exports.default = Section;